ICD-10-CM
ICD-10 code for Oligodendroblastoma unspecified site: C71.9
The ICD-10-CM index points "Oligodendroblastoma unspecified site" to C71.9, Malignant neoplasm of brain, unspecified. C71.9 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in C71
A header groups codes and is not billed. A billable code is one you can report.
- C71Malignant neoplasm of brainHeader
- C71.0Malignant neoplasm of cerebrum, except lobes and ventriclesBillable
- C71.1Malignant neoplasm of frontal lobeBillable
- C71.2Malignant neoplasm of temporal lobeBillable
- C71.3Malignant neoplasm of parietal lobeBillable
- C71.4Malignant neoplasm of occipital lobeBillable
- C71.5Malignant neoplasm of cerebral ventricleBillable
- C71.6Malignant neoplasm of cerebellumBillable
- C71.7Malignant neoplasm of brain stemBillable
- C71.8Malignant neoplasm of overlapping sites of brainBillable
- C71.9Malignant neoplasm of brain, unspecifiedBillable
Excludes1
Excludes1 means these codes are not reported together.
From C71. A note on a category applies to every code under it.
Related conditions
Related pages
- C71.9 code detailsNotes, nearby codes, CMS-HCC group
- Category C71Every code under it
- Chapter 2Neoplasms
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Oligodendroblastoma unspecified site?
The ICD-10-CM index points "Oligodendroblastoma unspecified site" to C71.9, Malignant neoplasm of brain, unspecified. C71.9 is a billable code.
Is C71.9 billable?
Yes. C71.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to C71.9?
The CDC tabular list gives 2 Excludes1 notes (not coded together) for C71.9 and the categories above it. They are listed on this page.
What chapter is C71.9 in?
Chapter 2. Neoplasms.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.